Using a sample of (10.09 +/- 0.04) x 109 J/psi decays collected with the BESIII detector, partial wave analyses of the decay J/psi -> gamma(KSKS0)-K-0 pi(0) are performed within the (KSKS0)-K-0 pi(0) invariant mass region below 1.6 GeV/c(2). The covariant tensor amplitude method is used in both mass independent and mass dependent approaches. Both analysis approaches exhibit dominant pseudoscalar and axial vector components, and show good consistency for the other individual components. Furthermore, the mass dependent analysis reveals that the (KSKS0)-K-0 pi(0) invariant mass spectrum for the pseudoscalar component can be well described with two isoscalar resonant states using relativistic Breit-Wigner model, i.e., the eta(1405) with a mass of 1391.7 +/- 0.7(-0.3)(+11.3) MeV/c(2) and a width of 60.8 +/- 1.2(-12.0)(+5.5) MeV, and the eta(1475) with a mass of 1507.6 +/- 1.6(-32.2)(+15.5) MeV/c(2) and a width of 115.8 +/- 2.4(-10.9)(+14.8) MeV. The first and second uncertainties are statistical and systematic, respectively. Alternate models for the pseudoscalar component are also tested, but the description of the -10.9 invariant mass spectrum deteriorates significantly.

Study of η(1405)/η(1475) in J/ψ→γKS0KS0π0 decay

A. Amoroso;F. Bianchi;A. Bortone;M. Destefanis;F. De Mori;M. Greco;L. Lavezzi;M. Maggiora;S. Marcello;S. Sosio;S. Spataro;
2023-01-01

Abstract

Using a sample of (10.09 +/- 0.04) x 109 J/psi decays collected with the BESIII detector, partial wave analyses of the decay J/psi -> gamma(KSKS0)-K-0 pi(0) are performed within the (KSKS0)-K-0 pi(0) invariant mass region below 1.6 GeV/c(2). The covariant tensor amplitude method is used in both mass independent and mass dependent approaches. Both analysis approaches exhibit dominant pseudoscalar and axial vector components, and show good consistency for the other individual components. Furthermore, the mass dependent analysis reveals that the (KSKS0)-K-0 pi(0) invariant mass spectrum for the pseudoscalar component can be well described with two isoscalar resonant states using relativistic Breit-Wigner model, i.e., the eta(1405) with a mass of 1391.7 +/- 0.7(-0.3)(+11.3) MeV/c(2) and a width of 60.8 +/- 1.2(-12.0)(+5.5) MeV, and the eta(1475) with a mass of 1507.6 +/- 1.6(-32.2)(+15.5) MeV/c(2) and a width of 115.8 +/- 2.4(-10.9)(+14.8) MeV. The first and second uncertainties are statistical and systematic, respectively. Alternate models for the pseudoscalar component are also tested, but the description of the -10.9 invariant mass spectrum deteriorates significantly.
2023
2023
3
1
31
e(+)-e(-) Experiments; Particle and Resonance Production; Spectroscopy
M. Ablikim; M. N. Achasov; P. Adlarson; M. Albrecht; R. Aliberti; A. Amoroso; M. R. An; Q. An; X. H. Bai; Y. Bai; O. Bakina; R. Baldini Ferroli; I. Ba...espandi
File in questo prodotto:
File Dimensione Formato  
JHEP03(2023)121.pdf

Accesso aperto

Dimensione 756.72 kB
Formato Adobe PDF
756.72 kB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/1946296
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 3
  • ???jsp.display-item.citation.isi??? 10
social impact